What causes a P1484 code?

P1484 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a P1484 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1484 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

P1484

EGR CAN sensor current too high

What it means

The ECM has detected that the electrical current draw for the Exhaust Gas Recirculation (EGR) valve actuator exceeds the calibrated limit, suggesting a short circuit or a seized component.